December 2021 0 8 Report
Из свойств вычитания следует:  28-(15+с) = 28 - 15 - с + 13-с,
 а- 64 - 26 = а - (64 +26) = а - 90.
 какое свойство вычитания применено в этих примерах? используя это свойство вычитания, упростите выражение: 
а) 35 - (18 +у);                                                  б) т - 128 - 472
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